- Four years ago, Trump wanted to ban TikTok at the end of his presidency.
- TikTok sued the government, and his efforts were foiled when Biden took office.
- Now, a TikTok ban is back on the table — with Biden's support and Trump opposed.
A TikTok ban inched closer to reality Wednesday after Congress overwhelmingly passed a bill that would force the app to divest its US business or shut down.